Tie holder for spike-driving machines



' Mar. 13', 1923.

1,448,265 H. DOAK v T IE HOLDEII FOR SPIKE DRIVING MACHINES Filed May 2, 1922 2 sheets-sheet 1 I INVENTbk. fifil? Hflodk Y WMM 771% A TTORNEYS.

Mar. 13,1923. 1, 48,265

J. H. DOAK TIE HOLDER FOR SPIKE DRIVING MACHINES- 2 sheets-sheet 2 Filed May 2, 1922 INVENTOR.

A TTORNEYS.

Patented Mar. 13, 1923.

UNITED STATES JOHN H. DOAK, 0]? LOS .ANG-ELES, CALIFORNIA.

TIE HOLDER FOR SPIKE-DRIVING MACHINES.

Application filed Ma a, 1922. Serial No. 557,975.

To all whom it may concern.

Be it known that I, JOHN H. DOAK, a citizen of the United States, and resident of Los Angeles, in the county of Los' Angeles and State of California, have invented new and useful Improvements in a Tie Holder for Spike-Driving Machines, of which the following is a specification.

This invention relates to a spike-driving machine and pertains particularly to means for holding a tie in position against the rails while the spikes are being driven.

The invention disclosed herein is especially adapted for use with a s ike-driver of the type disclosed in United tates Letters Patent 1,404,841, granted to me January 31, 1922. In such a machine, it is advantageous to hold the ties firmly again-st the rails while the spikes are being driven. The present invention relates to a structure of simple form which may be engaged with the underside of a tie, then operated to move and hold the tie firmly in contact with the rails, and next moved to disengage itself from the tie. Inaddition to the broader object of this invention, there are certain details of structure and corresponding accomplishments secured by the embodiment of the invention illustrated in the accompanying drawing, in which:

Fig. 1 is a side elevation of a spike-driv ing machine with the elements of structure unessential to the present invention omitted therefrom; and Fig. 2 is a plan view as seen in section line 2-2 of Fig. 1.

Referring more particularly to the drawing A indicates ties upon which rails B are laid. The frame of the machine is indicated generally by C. The tie holder mechanism is indicated generally by D. A fragment of a hammer of the spike-driver is shown in dotted lines and indicated by E.

The tie holder mechanism is arranged to en age a tie at two places, each place adjacent a rail. Mounted at the center of the frame are blocks 8 having slots 4 inclined to the horizontal. A. rocker beam 5 has a pivot pin 6 extending therethrough which is mounted in the slots 4 so that it may slide therein. At the rear of the rocker beam is a counterweight 7 and secured thereto is a cable 8 which is led over guide pulleys 9 to a point convenient to the operator of the apparatus. At the forward end of the rocker a picker-up 10 is pivotally connected. The picker-up is bifurcated the position shown in and each arm thereof has a slot 11 intermediate its ends. Each arm terminates in a finger 12. On the frame of the machine at the sides thereof are fulcrum pins 14, which rideinslotslL' I I The picker-up mechanism is normally in dotted lines in Fig.1. In this position, the pin *6 is at the top of the slot 4 the rocker beam 5 is in its for ward position and the picker-up 10 is in the position shown by the dotted lines with the fingers above the top of the tie so as to clear it. The beam may be moved to this position by drawing upon cable 8. ,The usual mechanical expedients, such as a Windlass, may be used for drawing the cable. To engage the tie and hold it against the rail, the

tie resting upon the ground beneath the rail,

cable 8 is released' The counter-weight 7 moves downwardly by gravity, sliding pivot pin 6 along slot 4. This moves the rocker beam to the rear into the position shown in full lines, pushing the picker-up downwardly, it being guided by the fulcrum pin 14 riding in slot 7 at the same time the picker-up is rocked so that the fingers pass downwardly under the tie, pulling it upwardly into firm contact with the rail. Weight 7 maintains the tie in the position shown. After the rails have been spiked to the tie, cable 8 is drawn to lift the rocker beam into the position shown in dotted lines.

The machine may then beadvanced to position for picking up and holding the next tie in position.

"What I claim is:

1. In a device of the character described having a frame, a picker-up comprising an arm having a finger to engage a tie, means securing said arm to said frame so that it may be moved longitudinally of itself and swung pivotally, and means to simultaneously move said picker-up arm pivotally and longitudinally.

2. In a device of the character described having a frame, a picker-up comprising an arm having a finger to engage a tie, said arm having a slot extending longitudinally thereof, a pin on said arm disposed in said slot so as to guide said arm in moving longitudinally of itself and to provide a pivot for swinging said arm, and means to simultaneously move said pickerup arm pivotally and longitudinally.

3. In a device of the character described having a frame, a pieker up comprising an arm having a finger to engage a tie, said. arm being provided with a slot extending longitudinally thereof, a pin mounted on said frame and disposed in said slot so as to guide said arm-in moving longitudinally and to provide a pivot about which said arm may swing and an operating arm pivotally secured to said first mentioned arm. said operating arm being mounted to be swung pivotally and to be moved longitudinally of itself so as to transmit a corresponding motion to said first mentioned arm.

4. In a device of the character described having a frame, a 'piclieraip comprising an arm having a finger to engage a tie, said arm being provided with a longitudsaid first mentioned arm.

inally extending slot, a pin. mounted on said frame and disposed in said slot so as to guide said arm in a longitudinal direction and to provide a pivot pin, a rocker arm pivotally secured to said first mentioned arm, said rocker arm having a pin forming a fulcrum, and an inclined Way in which said fulcrum pin is disposed so that rocking of said operating arm will move said arm pivotally and longitudinally thereby transmitting a corresponding motion Up In Witness that I claim the foregoing I have hereunto snbscril'i'ed my name this 14th day of April, 1922.

JOHN H. DOAK. 

